Machines



' 2 Sheets-Shet 1. W. H. GREENWOOD. & P. FARRAR. APPLIANCE FOR PREVENTING UNEQUAL WEAR OF LBATHERS 0F DRAWING-OFF ROLLERS 0F GOMBING MACHINES;

No. 373,890. 1/2 Patented Nov. 29, 1887.

(No Model.)

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N. PETERS} rhomuma a w. )Nnhingmmll cv v 2 Sheets-Sheet 2. W. .H.- GREENWOOD & F. FARRAR. APPLIANCE FOR PREVENTINGUNEQUAL'WE'AR OF LEATHERS 015 (No Model.)

I DRAWING-OFF ROLLERS 0F GOMBING MACHINES. N0.

Patented Nov. 29, 1887.

| I l 4 I l I N. PETERS, Fholo-Umognphor, Washington nc.

UNITED STATES PATENT OFFICE.-

WILLIAM HORSFALL GREENWOOD AND FREDERICK FARRAR, OF BRAD- FORD, OOUNTY OF YORK, ENGLAND.

APPLIANCE FOR PREVENTING UNEQUAL WEAR 0F LEATHERS OF DRAWING-OFF ROLLERS 0F COMBING- MACHINES.

SPECIFICATION forming part of Letters Patent No. 373,890, dated November 29, 1887.

Application filed June 25, 1886. Serial No. 206,266. (No model.) Patented in England Ju y 27, 1855, No. 9,009.

To all whom, it may concern.-

Be it known that we, WILLIAM HORSFALL GREENWOOD and FREDERICK FARRAR, both of Bradford, in the county of York, England, have invented an Improvement in Appliances for Preventing Unequal Wear of Leathers of Drawing-0ff Rollers of Combing-Machines, of which the following is a full, clear, and exact description.

Our invention consists in an improved device for regulating the speed of the traverse of the leathers of the drawing-oft rollers of the Nobles and other combing machines in which such leathers are traversed by means of eccentrics fitted on a cross-shaft under the revolving circular rack, which eccentrics impart a reciprocating motion to the slidebrackets carrying the runners or guides for the leathers.

Hitherto the eccentrics have been driven at a regular speed, generally by means of a ratchetwheel fixed on the end of the eccentric-shaft,

the pawl which drives it being mounted on one nd of an L-shaped lever, the other arm of-w ich-is actuated by projections on the under side of the flange of the circular revolving rack. Thus an irregular stroke or traversewas communicated to the slide-brackets as they attained a maximum speed when the eccentrics were at half-stroke and a minimum speed atthe commencement and termination of each stroke. This irregularity of the stroke of the slide-brackets and corresponding irregularity in the traverse of the leathers caused such leathers to wear unequally, and therefore work imperfectly. By our improvements We impart a more regular stroke to the slide-brackets, and consequently a more perfect or regular traverse is imparted to the leathers, which are therefore more evenly worn and maintained in workingorder considerably longer than heretofore.

In the drawings, Figure 1 is a plan of the circular revolving rack, the steam-chest, and slide-brackets of a Nobles combing-machine, together with the ordinary mechanism for actuating such slide-brackets in conjunction with our improvements. Fig. 2 is a side elevation, and Fig. 3 is a sectional elevation of the same. Fig. 4 is a partial sectional elevation, and Fig.

5 is a partial side elevation, of the ordinary means for shifting the leathers. Fig. 6 is a side elevation of our improved arrangement with the circular rack in section.

Hitherto the eccentrics 7p have been driven at a regular speed by means of a ratchet-wheel, 1, Figs. 4 and 5, fixed on the end of the cocentric-shaft a, the pawl 3, which drives it, being mounted on one arm of an L-shaped lever, 4, the other arm, 5, of which is actuated by projections h on the under side of the flange 7 of the circular revolving rack j. Thus an irregular stroke or traverse is communicated to the slide-brackets Z as they attain a maximum speed when the eccentrics 7c are at half stroke and a minimum speed at the commencement and termination of each stroke. This irregularity in the stroke of the slide-brackets Z and corresponding irregularity in the traverse of the leathers 11 causes such leathers to wear unequally, and therefore to work imperfectly. The revolving circular rack j is below the combcircles 0, as shown in Figs. 4 and 6.

To carry out our invention, we fix on the eccentric-shaft a, at the opposite end to the ratchet-wheel b, by means of which the shaft is rotated, a metallic disk, 0, opposite segments of the periphery of which are cut with ratchetteeth d. At the side of the disk 0 a pendent lever, e, is mounted on the bracket f, fixed to the steam-chest g. The inclined adjustable tappets 0r projections h are bolted to the under side of the flange of the revolving circular rack j, and they come alternately in contact with the top of and impart an oscillating motion .to the pendent lever e, and the pawl'l, mounted thereon, receives a reciprocating motion. Thus, as the disk 0 revolves each time the eccentrics k approach the end of their stroke and the slide-brackets Z their minimum speed, the pawl Z engages with and gears into the teeth (1 and gives an additional movement, so as to accelerate the speed of the disk 0, the'shaft a, and the eccentrics 7c, and therefore accelerates the speed of the slidebrackels Z, carrying the runners or guides for the leathers 11, and thereby communicating a more regular traverse to such leathers. Each tappet his secured to the under side of the flange of the circular rack j by a bolt, 12, and and having segments of teeth on opposite sides, several boltholes are provided for said bolt, the lever e and pawl Z, the bracketf, to which as shown in Fig. 1, to allow for properly placthe lever e is pivoted, the circular rackj, and

ing said tappet h. the tappets h, secured to the flange of said 15 5 lVe claim as our inventionrack, substantially as and for the purposes set The combination, with the drawingoff rolls forth. and leathers in a combing-machine, of the WILLIAM HORSFALL GREENWOOD. shaft a, a ratchet-wheel, b, at one end, a pawl FREDERICK FARRAR. by which a progressive rotation is given, ec- 'Witnesses: v to centrics k, brackets Z, runners or guides upon J. W. HARDING,

said'braekets, the disk 0 upon said shaft a BENJ. J MAOKIN. 

